Filter-press.



' Patented Dec. 12', i899.- e. ACKERMANN.

FILTER PRESS. (Application flld Aug. 17, 1898.)

(No Model.)

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I HE STATE PATENT OFFICE eUsTAv AoKERMANn, OF OHABLOTTENBUBG, GERMANY, ASSIGNOR TO FILTER AND BRAUTEOHNISCHE MASOHINEN-FABRIK AOTIEN-GESELL- SOI-IAFT, VORMALS L. A-. ENZINGER, OF WORMS, GERMANY.

FILTER=PRES'S.

SPECIFICATION forming part of Letters Patent No. 638,949, dated December 12, isee.

Application 518a tiu'gtst 17, 1298.

To ctZZ whom it may concern.-

, Be it known that I, GUSTAV ACKERMANN, brewmaster, of Oharlottenburg, near Berlin, Germany, have invented certain new and useful Improvements in Filter Presses with Intermediate or Collecting Chambers, of which the following is a full, clear, and exact specification.

The present invention relates to an improvement in filter-presses of the kind described in the German Patent Specification No. 42,894. In the press there described, however, the liquor or fiuid to be filtered only passes through a single wall of filtering material before entering the chamber from which the clarified liquor is drawn. In order to obtain a clearer filtrate which keeps better from thick turbid fluids, the filter-press according to the present invention is provided with an intermediate chamber, being thus divided into a preliminary and a secondary filter. On the accompanying drawings su ch a filter-press with double or collecting chamber is illustrated.

In the drawings, Figure 1 is a perspective View of the filter-press with the parts thereof separated. Fig. 2 is a front view of one of the gridiron-frames, and Fig. 3 is a sectional View of the same. I t

The fluid to be filtered leaves the inletchamber E by the aperture ct at the bottom and aperture 1) at the top, running thence into the channels or passages a b, which are formed, when all the single frames and plates are brought close together, with their apertures in line. The filtration is effected by means of gridiron-frames 1 and 2, between each pair of which a filter-plate 3 is arranged. Each such pair of frames and plate has, in addition to the apertures a Z], other similarapertures c d, which likewise form channels when the separate frames and plates are brought together. In the gridiron-frame 1 the passages a b are connected with the interior of the frame and, at the frame 2 the Serial No. 688,779. (No model.)

passages c d are similarly connected, while at the filter-plates the passages merely form the connection between the passages in the frames. The openings at I) do not connect with the interior of the frames 2 and the passages c d do not connect with the interior of the frames 1. The action, broadly stated, is that the liquid flows into one set of frames 1 through the openings a Z), thence through the filter-plates, and out through the frames 2 by way of the passages c d. The passages on b in the frames 1 and the passages c d in the frames 2 are connected with the interior of said frames by the passages f. The filter frames or plates are preferably of the kind described in the German Patent Specification No. 69,043, according to which a filter-layer composed of compressed pulpy fibrous material isinclosed in a frame.

The liquid to be filtered flows through the passages a 1) into the gridiron-frame 1, (or frames when for the sake of greater efficiency a number of pairs of gridiron-frames and filter-plates are"used.) From the frame 1 the liquid then passes to the left and right through the filter-plates into the gridironframe 2, leaving the latter filtered, and through the passages c d. These passages c d are in-connection with the double chamber D. The filtered but still more or less turbid fluid enters this collector, leaving it at a b, in order to be again filtered on its further passage along the channels a b behind the chamber D through the frame 1, filter-plates, frame 2, and passages c d, finally entering the end chamber S completely filtered, where it may be run ofi through a discharge-cock. The collecting-chamber D, for the sake of securing better cleansing, is preferably constructed in two halves. It is provided on the top, like the chambers E S, with a gage and below witha draw-off cock, (which also serves as an air-outlet,) which permit of the filter-press being used only as a preliminary filter--that is, as far as the chamber D.

or collecting chamber or chambers D, all as I6 after each gridiron-frame 2; but it Willin most and for the purposes hereinbefore set forth. cases be found convenient to arrange half the In Witness whereof I have hereunto set my filter-press as a preliminary filter and the hand in presence of two Witnesses.

If desired, a chamber D may be introduced segocrigigalf as a secondary filter. GUSTAV AOKERMANN. V In a screw filter-press, the combination with Witnesses: an inlet-chamber E, gridiron-frames, filter- HANS HEINMANN,

plates and end chamber S, of an intermediate 0. H. DAY. 

